6, 2017 1:09 PM
Subject: Re: [Elecraft] Solar power?
My experience shows that bigger solar panel is safer. My 60W panel in real
life gives less then 1 A on a cloudy day and about 4 A on a bright sunny day
when the sun is in its zenith. It also has USB and 12V output which can be used
fo
*From:* Igor Sokolov <ua9...@gmail.com>
*To:* elecraft@mailman.qth.net
*Sent:* Monday, February 6, 2017 12:42 PM
*Subject:* Re: [Elecraft] Solar power?
I am using 60W foldable solar panel, Genasun MPPT controller
https://genasun.com/products-store/mppt-solar-
:42 PM
Subject: Re: [Elecraft] Solar power?
I am using 60W foldable solar panel, Genasun MPPT controller
https://genasun.com/products-store/mppt-solar-charge-controllers/ (they
are RF quiet) and 5500 AH LiFePo4 battery with built it limiting
circuitry which some outlets are selling as a subs
I am using 60W foldable solar panel, Genasun MPPT controller
https://genasun.com/products-store/mppt-solar-charge-controllers/ (they
are RF quiet) and 5500 AH LiFePo4 battery with built it limiting
circuitry which some outlets are selling as a substitute for lead acid
motorcycle batteries.
On Mon,2/6/2017 11:21 AM, John Sager via Elecraft wrote:
I am using the Buddipole 4S2P 5Ah battery (fairly expensive at $165 when
compared to others like Bioenno, etc.)
Wildly expensive is the right word. :)
along with the Genasun MPPT controller ($99)
The Genesun controllers are
AGM works well or LiFePo4 (lighter, smaller and more expensive, higher
operating voltage so better for radio, pickier to charge properly)...
Neither offgas so they're safe for in the home. AGM can be used down to
50% charge, lithium 80% without damage, so you have to compensate when
blockquote, div.yahoo_quoted { margin-left: 0 !important; border-left:1px
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!important; } I am using the Buddipole 4S2P 5Ah battery (fairly expensive at
$165 when compared to others like Bioenno, etc.) along with the
You might look into CirKits SCC charge controllers. I use the SCCS3 here
with two 50W 12V PV panels to keep the 75A-H station battery charged.
It's an easy-to-build kit.
cirkits.com
73,
matt W6NIA
On 2/6/2017 10:37 AM, Harry Yingst via Elecraft wrote:
My son has my KX3 and I'm building a
My son has my KX3 and I'm building a K2. Both of us have a set of solar panel
that are capable of a lil over an amp at 12v
We are both looking for a battery idea and a method of hooking it to the solar
panels to charge it .
Thank you
Up here in Alaska I had a few experiences using solar powered remote
communication systems. I worked a couple years for the BLM Wildfire
Center (Fairbanks) radio shop and we had some 5w GE repeaters
installed in big fiberglass boxes with a square solar panel attached
to the cover. We would
Panels are rated for a standard sun (1000 W/m^2 insolation) at I think
25C. This is for the maximum power point, which is almost never the
voltage to charge the battery at. The ones I've played with (powerfilm
5W, HQRP 20W) do more or less make their rated power in full sun (really
blue sky),
I suspect you're going to have to reinvent at least some of the wheel. I
have a 10-watt panel I got several years ago and have used to power a K2 at
several Field Days. It generates 0.5 amps at up to 20 volts in strong
sunlight. Lower light intensity reduces the voltage but the amps stay
From personal experience with the KX3 and solar panels, a 10 watt panel
simply won't keep up. A 20 watt panel is fine on a bright sunny day if you
shift its position and angle several times during the day. But I now use a
30 watt folding panel which has been adequate even on slightly overcast
I'm using two solar setups. One is a 100W system for the K3 and KX3 /
ham station generally. That's probably not going to interest anyone
for portable ops with the KX3.
Five or so years ago, I bought 80 4.5-inch wafers from a 2nd tier
outfit in New England. From these, I built two panels that
The key here is a good charge controller. I use a mppt controller and it is
98 % efficient. Gets 30% for charge. Has 3 different charge rates and
handles all battery types.
My RV is also wind turbine and solar powered. I have 560 watt solar to my
mppt charger, then to my 900 amp hr battery bank.
I agree re the charge controller. I use a kit-built one from CirKits.
Model: SCC3. It is uber-RF-quiet being a linear cc, and can handle
20A.
73,
matt W6NIA
On Fri, 19 Apr 2013 10:30:57 -0500, you wrote:
The key here is a good charge controller. I use a mppt controller and it is
98 %
MPPT Controllers (small capacity) are few and far between and expensive.
Several are actually PWM, are falsely marketed as MPPT, making the
situation complicated. A MPPT controller can produce about 30% more power
from a given solar panel during the summer months and about 10% more during
the
I have two solar panels mounted together that I got, along with
a 36AH SLA battery for running our Colman camp cooler (5A draw)
on road trips. The panels together supply about 7.5A at 12-18V
and will fit on the roof rack of our 4Runner. I also have a made
in China charge controller for the
A side note for those attending Dayton. There has been a company that
manufactures solar panels for the government at Dayton the last couple of
years. They sell blemished panels that are used as panels in tents for
power that would work perfectly for the KX3. I've got two of them and use
them
Rather than reinvent the wheel, does anybody have experience or suggestions for
a small solar array sufficient to keep a KX3 with internal batteries going
during daylight? I would assume 10 watts average over a reasonable TX duty
cycle would be enough.? Something strong enough or flexible
@mailman.qth.net
Subject: [Elecraft] Solar Power for KX3
Rather than reinvent the wheel, does anybody have experience or suggestions
for a small solar array sufficient to keep a KX3 with internal batteries
going during daylight? I would assume 10 watts average over a reasonable TX
duty cycle would be enough
This Fred will second the other Fred. My engineering team designed a
solar system for 4 repeater stations for a pipeline communications
system in S. Africa. It was hugely overdesigned, we had to to meet the
contract specs. In full sun, it made over 200A, way more than the wet
glass
It seems like it would be cheaper and easier to do away with the solar
panels and charger. Use the money to buy a few more batteries. Charge
them before FD and you're good to go.
Think about this. It may even rain on FD! The solar panels would only
be good as an ad hoc umbrella or tent
Andrew:
This is exactly what we do at Field Day every year. We search and
pounce, so our transmit duty cycle is relatively low, but after
operating all afternoon, the 7 Ahr battery used with the QRP K2 is
almost fully charged (assuming sunny weather, of course). We use two 5
Watt solar
Brian:
We have plenty of gel cells for Field Day, and, as you noted, don't
really need to use the solar panels at all. However, we get 100 bonus
points when we make QSOs using a battery charged via solar energy. You
can't forget bonus points!
73's,
John AA0VE
Brian Alsop wrote:
It seems
I got into some wrong notes this morning. 600 MA is the amount adding
the KPA-100 adds to the K3 during key down or transmit conditions. My
earlier measurements were the right ones. I have the larger solar
controller from Don Brown KD5NDB and it works well with an AC power
supply I use to
I'm very interested in hearing responses to solar setups for use with
the K2 and would appreciate seeing replies shared on the list, if it's
not considered too off-topic.
Thanks,
--Andrew
On Tue, Mar 18, 2008 at 3:32 PM, Kenneth A. Christiansen [EMAIL PROTECTED]
wrote:
I got into some wrong
18, 2008 11:32 AM
Subject: [Elecraft] Solar power for the K2
I got into some wrong notes this morning. 600 MA is the amount
adding
the KPA-100 adds to the K3 during key down or transmit conditions.
My
earlier measurements were the right ones. I have the larger solar
controller from Don Brown
Ken, I show a 33 watt solar charger in Northern Tools
that is $299.99 and 38X11-3/4x1 and 13 lbs. Doable
in a car, but a bit big for back packing. Also
pricey. It does not include a controller at that
price.
--- Kenneth A. Christiansen [EMAIL PROTECTED] wrote:
I got into some wrong notes
Andrew,
When reading the other posts and seeing those large Solar Panel
wattages, I think they are using a K2 but with the 100W option. I
can't imagine needing a 33W solar panel to power the base K2 model.
On a nice day, I guessing you could hook up a 7 Ahr gel cell and have
it charged with a
I'm trying to set up a remote radio location with solar power.
Does anyone have current info on the best solar panels and charger?
Frank W7is
** See what's free at http://www.aol.com.
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Elecraft mailing
I run my Elecraft K1 at home off of four Siemens 55 watt panels. I use
a 30 amp charge controller which feed six golf cart batteries that are 6
volts each at 200 amp-hr. I have them wired in three pairs go give 12
vdc at 600 amp-hr. The panels and the batteries are now 12 years old
and
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